Fair enough, Stupid Rules, I get worked up too easily. But you tend to be condescending which shows a lack of respect that I think we're all entitled to, until we lose that respect at least.
As for my advice. . . RedisRad. You are doing too much. Possibly look into doing schedule edits rather than the whole front end schedule. As the only GSTL, your time is better spent elsewhere. Also, in regards to your registers. Your SFT should be heavily involved in this, to the point where all you should have to do is tell him whats wrong. Next time there is a tech in to "fix" the registers, see if they're willing to switch equipment around so you can get all your working registers in one area. Try asking this while offering a free Starbucks. It helps
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StupidRules made an excellent point about templates for coachings/CCAs. Do that.
I try to make my coachings, especially regarding conversion, as positive as possible, but if your cashiers are then laughing at you when you follow up, that's borderline "failure to perform job duties in a positive manner". I wouldn't go there right away, but I would absolutely ask them what they thought was funny about the situation. Ask them if they are unwilling to perform their job duties. That'll get the point across. When your cashiers come to you with every little thing, start asking what they think the best thing to do would be. Don't make them feel dumb, but walk them through the process. Over time, it'll get better. It'll be slow though.
Regarding help from other TLs, I would try to grab as many of them as you can after a huddle, or round them up somehow and say what you need to do that day. Ask them what they have. If you can help them, do. Have guest service fold clothes and towels if they have time. Push an endcap in accessories for POG, or just detrash product for them. Have a cashier work out push for See. Spot. Save from the truck. Have your cart attendant re-shop bulky items. If they see you try to help, they'll do the same. If you need help to step off stage to write up a CCA and no one will volunteer, ask what they have to do that is more important. Trust me, nothing is more important than development. They know this too, deep down. Try not to be too much of a burden, and don't take advantage of them when they do help. If they still aren't responding and your leadership team doesn't care. Stay after your shift (on the clock) to get your stuff done. Keep your ETL informed that you stayed after. At the end of the week, tell them where you need to cut and ask them how you should go about doing it. They won't love it. I promise. Right now, they are walking all over you though. They need to know it won't always work like that.
You've received some good advice, but really, it just sucks. I like my job, but the expectations are too high for what they give you. Do your best and try to focus doing each task more efficiently. You'll get there.
Also, and I'm sorry to be a downer about this, but I highly doubt they'll even consider considering you for ETL until your conversion is green, no matter what they've told you. They want you to run a green work center. You may already know this, but keep it in mind.
RedisRad- I agree with you about rapport. I don't think you're making a bad call here. I also agree about the coaching you did when it got busy. You can't be in the middle of a coaching, tell the TM to jump back on and then continue the coaching 10 min later. It doesn't work like that, at least, not if you want the coaching to be effective.