Hull moved level on 63 points with seventh-placed Nottingham Forest, just two behind Leeds, while Millwall and Leicester are four and five points further back respectively.
But despite one win in six matches Grayson remains upbeat and said: "For all we've had a frustrating week, we're still in a good position and if we win our remaining games we'll secure that position.
"It could have been worse but it should have been a lot better because we should have won at Derby.
"Results haven't gone too badly for us. But we have to concentrate solely on what we do to reach our target of the play-offs now.
"We did it last year. We're not chasing anyone. If we win our games we get in the play-offs. Let's achieve that target. We've got a big game on Friday against Reading now and a big weekend with Palace a couple of days later."
Source: PA