Cyclone V speed is much slower

Thanks to everyone who responded to my problems. I am trying everything to get this resolved. I am using Q 15.0, the latest. I have cleaned up my design but it didn't help. I added pipeline stages in my design but it didn't help.

In the timing report, the recommendation is the following

Move 0 combinational nodes before the source and 3 after the destination for the path from corr|...3]~_Duplicate_54 to corr|..._1~mac_pl[0][16] [hide details]

Issue: Unbalanced Combinational Logic

From: shift_b[1][3]~_Duplicate_54

To: lpm_add_sub:adder_pipe[18]|add_sub_7ic:auto_generated|op_1~mac_pl[0][16]

TimeQuest analysis: report timing

Nodes to move after dest:

3

Nodes to move before source:

0

This message doesn't make sense to me. Can anyone help me to decipher this?

Thanks in advance.