I was worried it might be 8hr+ for work. Lev usually takes a little longer to kick in than Lantus does.
Yes, still wait until 6:30 to shoot.
It looks like either the carbs are keeping her high or she is bouncing due to such a low number last night. If she stays up in the pinks and reds I would be more inclined to shoot a reduced dose. I'll let the other guru's offer advice on how much to reduce. If she starts dropping I would worry a bit more that the carbs are wearing off and she might need an even smaller dose or possibly another skip. High dose cats have a larger depot of built-up insulin that can help even with a skipped shot.
I would recommend getting a +11 and posting here if the numbers change or start dropping(and add a "need advice" in the title to get more eyes on your condo). This allows some time for others to see the numbers and offer suggestions before you are right at shot time.
Don't worry about one number or even one day. The long term goal is what you are working towards and Baby just had a big change switching insulins and keeping her safe is goal #1.