Ah, low self-esteem, something I know well, and have found several work-arounds for. You said these were newer stores, correct? New, newish? Then the appropriate thought is "They've lost many people who were recently trained for these new stores, as the job isn't what they thought it would be, and since the initial hiring rush died down, they're probably lacking applicants! They'd take a dog if it could turn in the application filled out!"
Now, low self-esteem aside, if I remember correctly, you've been at your current place for a while (at least a year, no?) and that's apparently the bar for stability and dependability lately, which is a big plus, and you know what you're doing, which is a second big plus. They'd be stupid to not make the offer. *crosses fingers* Good luck!