Anyone know why?

Saw some blocks for Wednesday.. 1. 6a-11a for $120 2. 1p-6p for $110

When I took the 6a-11a block, the 1p-6p disappeared. The only thing left were 3 base pay, 3 hrs blocks.

Is there a thing that you can't have 2 "surge" blocks in one day? 🧐