The changes you recently made to the "scrolling" have made approving time entries a lot more difficult. When you individually select a bunch of time entries and then go to approve them, it apparently only approves the entries currently visible on the screen at that time (approx 10 entries at a time). When have several hundred to approve this will take dozens of different steps. If you use the "select all" on the left, it selects 25 at a time. But when you scroll down to make sure you want to approve all 25, it will automatically bring up the next 25 - and those next 25 will be also selected for approval. It is not possible to know how far you can scroll down before the next 25 are displayed and added to the select all list.