An overload of hundreds of programs approved in Marin’s 2007 Countywide Plan has proven to be too much to handle for the Community Development Agency, which told supervisors last week in a staff report that they should consider an amendment to the plan to “realign the lofty aspirations” with the realities of staff and financial constraints. “We are not keeping pace with the schedule that was envisioned in 2007,” said Tom Lai, the agency’s assistant…